Malicious PDF — malware analysis report

Static analysis result for SHA-256 5adf3a819865323f…

MALICIOUS

PDF

146.3 KB Created: 2021-06-07 00:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f2dc965b2acb23024d72711e27de8287 SHA-1: e1e841cbe0ab2f4eb7fc94f51408036e3de6c6da SHA-256: 5adf3a819865323f3883f3756e91188bb4293b09592f374c5862c1b172df8277
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://synerhu.ru/pbw?utm_term=how+to+connect+my+evo+vr+controller PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391303/normal_6039c1177c09b.pdfIn PDF document text
    • https://nibapexi.weebly.com/uploads/1/3/0/9/130969889/gowesewajeto_zulijeris_nituzokawexadan.pdfIn PDF document text
    • https://judorobizud.weebly.com/uploads/1/3/4/4/134455398/cc1d6c6ed06.pdfIn PDF document text
    • https://jezugazaditok.weebly.com/uploads/1/3/4/6/134601365/xivamiguxapu-fogebager-pebego-nixito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459318/normal_602e645eab308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_6010b0bf9484d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kepigiwup.pbworks.com/f/ximodipusosumovutidob.pdfIn PDF document text
    • http://wudiwiligis.pbworks.com/f/64899182950.pdfIn PDF document text
    • http://saladolu.pbworks.com/f/zisaremukarizasikipatez.pdfIn PDF document text
    • http://tiduxikuve.pbworks.com/w/file/fetch/144423468/99539648150.pdfIn PDF document text
    • http://degagogo.pbworks.com/w/file/fetch/144587226/86501175902.pdfIn PDF document text
    • http://bijinim.pbworks.com/f/74541408631.pdfIn PDF document text
    • http://mikabipi.pbworks.com/w/file/fetch/144724440/what_is_the_symbolism_of_sunflowers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa3bc0e-7425-41f5-a444-52013f649b53/legisunisobonipofefik.pdfIn PDF document text
    • http://sawanixum.pbworks.com/w/file/fetch/144521853/lopujakan.pdfIn PDF document text
    • http://tereburokofe.pbworks.com/w/file/fetch/144504753/zalutewuwinatavalavomu.pdfIn PDF document text
    • http://molitutolu.pbworks.com/w/file/fetch/144545964/72449117854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be89467-ba3f-4a26-98b8-9b1c3530782f/how_to_make_page_breaks_in_wordpad.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ea5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA5E 4772 bytes
SHA-256: 36a5639b030458387a638ad6ee1e4611b61387475a8dfff1aed86e061ce70dee
font_01_sfnt_off0001fa99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA99 12508 bytes
SHA-256: 74584b60fe5fc6ce801bc6aa518135ed9879bb11c74f7751daa5bda481e08b7e
font_02_sfnt_off000224da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x224DA 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d

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